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Reptiles/chameleon has developed a black spot on its side


Black spot
Black spot  

Black spot close up
Black spot close up  
species - chamaeleo calyptratus (female); habitat size - 100x50x40 (lenghtxheightxwidth); substrate - exo terra forest bark; humidity - ~30%; basking temp 35C/ ambient 23C; lighting - Exo Terra Sun Glo 100w and UVB Exo Terra 100 5.0 13w (coil); vet history N/A; food - crickets, Nauphoeta cinerea cockroaches, superworms; feeding every day; supplement every time when feeding with "VIGOREPT"; last time ate 10 min ago; water is given in a fountain and is filled up once in a while when it evaporates a little; defecated today; captive bred; shed ~1 month ago; no animals living in the same terrarium.

It seems that a black spot has appeared on the right side of the chameleon. At fist there were a few little spots and strokes, after a day or so it became like what you can see in the pictures. What could it be and how should we treat it?

Please convert your measurements to English standard.
I need to see a photo of the terrarium which shows the basking spot in relation to the light sources.
What is her age?

The Exo Terra brand are a complete waste of money, based on independent testing. The Sun Glo is not a UVB lamp, and there isn't a coil lamp out there made which effective without being unsafe.

I recommend you purchase ZooMed linears or PowerSun mercury vapor or lamps from the Arcadia brand line, which are at the moment the most effective and safest lamps on the market.

Your humidity is far too low for this species.

I will also recommend you cease usage of that supplement, or any supplement containing D3. Proper D3 production the reptile should be achieved with quality UVB products along with a calcium only supplement. If you would like to see the necropsy of a Veiled Chameleon and the effects of excessive but typical D3 use, see my other albums on the facebook page.  

Has this chameleon suffered any trauma recently, such as being dropped, or decor falling on her? Has she been outside or been in the proximity of any other animals recently? Have you used any chemicals in her proximity or to clean her terrarium lately?  


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YOU WILL GET A REJECTION OF YOUR QUESTION IF YOU FAIL TO FOLLOW THE INSTRUCTIONS TO QUESTIONER IN FULL!. I am primarily here to assist with health concerns. I am here for the more difficult questions. Not for questions that you could research & easily find the answer yourself. My standards are that you provide DETAILED and RELEVANT background history on your pet before you ask me any question about it other than GENDER or ID. The requested information is in the instructions to questioner. Failure to answer each of those questions to provide that background, will result in your question being rejected. I can answer questions related reptile husbandry, identification (esp. in Texas and the SW), legal aspects, and advanced level medical care. I am the director of Wichita Falls Reptile Rescue (TX), a wildlife rehabilitator specializing in reptiles, a founding member of The Society for Horned Lizard Preservation, a subscriber to the International Veterinary Information Service,, educational content contributor to, and a Dept of State Health Services accredited animal control instructor (CE) for reptile handling. I do most of my own veterinary care in-house, including minor surgery and necropsy. I am most experienced in Chelonia with box turtles and common smaller tortoises; and in Squamata with everything from Anoles, Geckos, Beardies, and Monitors, to venomous snakes. I am most known for my expertise with horned lizards (Phrynosoma). With snakes, my primary expertise is in Crotalids (rattlesnakes), but I can answer a broad range of questions about various species. I am not aware of any reptile related question that I would not be able to provide some reasonable answer for. I have a direct style and may tell you something you did not want to hear; but the welfare of the animal comes FIRST with me, and I will always reflect that position in my answer, despite how it might make you feel.


I am a non-academic herpetologist with 25+ years reptile experience, and I am an accredited Texas Dept of State Health Services Animal Control Instructor for Reptiles (CE). I am a reptile rescuer, reptile wildlife rehabilitator, and subscriber to the International Veterinary Information Service, wikivet, and article/journal content contributor to Lafebervet. I have medical and scientific resources available, and I perform in house reptile veterinary care for my rescues. I am not a vet, but I read from the same materials and have had to correct quite a few in the past. The average vet is not well versed with reptile physiology and medical treatments.

Animals that I am currently caring for, or have significant rehabilitation and husbandry experience with: Horned Lizards (5 species); Eastern and Western Box Turtles; Painted, RES, YBS, Soft-Shell, and Cooter aquatic turtles; Russian Tortoises; Fire Bellied Toads; Fire Bellied Newts; Ornate Horned Frogs; Green Iguanas; Desert Iguanas; Spiny Lizards; Long Nosed Leopard Lizards; Anoles; Racerunners; Collared Lizards; Bullsnakes; Eastern Ratsnakes; Great Plains Ratsnakes; Kingsnakes; Gartersnakes; Cornsnakes; Boas; Pythons; Bearded Dragons; Water Dragons; Massasauga Rattlesnakes; Western Diamondback Rattlesnakes; Leopard, Mediterranean, Golden, Indo-Pacific, African White-Spotted Geckos; Savannah Monitors; Jeweled Curly-Tailed Lizards; Long-Tailed Grass Lizards; Fox Squirrels; Deer Mice; Hispid Cotton Rats; Merriam's Pocket Mice; Eastern Cotton-Tails; Blue Bar racing pigeon; Budgies; Asian Forest Scorpions.


Co-Founder & Director: Wichita Falls Reptile Rescue

Founder: The Society for Horned Lizard Preservation

Publications contributor. The Horned Lizard Husbandry Manual - self published 75 pages of care information on genus Phrynosoma.

Wikipedia entry "Horned Lizards" - contributed to a majority of the content., and various reptile related forums and email lists under the handles "fireside3" and PhrynosomaTexas".

My hands-on field, rehabilitation, and captive husbandry experience beats a PhD any day of the week. I am also a state accredited animal control instructor for reptile handling.

Past/Present Clients

I was requested to provide my care manual on the Desert Horned Lizard (Phrynosoma platyrhinos), for the Montreal zoo. My manual is also used by several other zoological institutions in N. America. I also teach reptile education to summer camps, and instruct wildlife rehabilitators on live saving and rehab techniques with reptiles.

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